APA (7th ed.) Citation

Helvig, M. (1964). Chicago's external truck movements: Spatial interactions between the Chicago area and its hinterland.

Chicago Style (17th ed.) Citation

Helvig, Magne. Chicago's External Truck Movements: Spatial Interactions Between the Chicago Area and Its Hinterland. Chicago, Ill, 1964.

MLA (9th ed.) Citation

Helvig, Magne. Chicago's External Truck Movements: Spatial Interactions Between the Chicago Area and Its Hinterland. 1964.

Warning: These citations may not always be 100% accurate.